MPG UK to MPG US Conversion Chart
| Miles per Gallon (UK) (mpg uk) | Miles per Gallon (US) (mpg) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 12.01 mpg uk | 10 mpg | Heavy Heavy-Duty Commercial Pickup Truck Rating | 12.01 × 0.832674 = 10 mpg US |
| 18.01 mpg uk | 15 mpg | Full-Size V8 Passenger SUV Highway Fuel Economy | 18.01 × 0.832674 = 15 mpg US |
| 24.02 mpg uk | 20 mpg | Mid-Size All-Wheel Drive Crossover Combined Rating | 24.02 × 0.832674 = 20 mpg US |
| 30.02 mpg uk | 25 mpg | Standard Four-Cylinder Compact SUV Commuter Vehicle | 30.02 × 0.832674 = 25 mpg US |
| 36.03 mpg uk | 30 mpg | Efficient Turbocharged Four-Cylinder Highway Sedan | 36.03 × 0.832674 = 30 mpg US |
| 42.03 mpg uk | 35 mpg | Modern Compact Hatchback Combined Highway Efficiency | 42.03 × 0.832674 = 35 mpg US |
| 48.04 mpg uk | 40 mpg | Subcompact City Commuter Gas Vehicle Benchmark | 48.04 × 0.832674 = 40 mpg US |
| 54.04 mpg uk | 45 mpg | Full Hybrid Mid-Size Passenger Sedan Fleet Rating | 54.04 × 0.832674 = 45 mpg US |
| 60.05 mpg uk | 50 mpg | High-Efficiency Dedicated Hybrid Benchmark Sedan | 60.05 × 0.832674 = 50 mpg US |
| 66.05 mpg uk | 55 mpg | Ultra-Aerodynamic Eco Hybrid Commuter Vehicle | 66.05 × 0.832674 = 55 mpg US |
| 72.06 mpg uk | 60 mpg | Plug-in Hybrid Sustaining Mode Highway Economy | 72.06 × 0.832674 = 60 mpg US |
| 84.07 mpg uk | 70 mpg | Lightweight European High-Mileage Prototype Car | 84.07 × 0.832674 = 70 mpg US |
| 96.08 mpg uk | 80 mpg | Two-Stroke Commuter Scooter Urban Cycle Benchmark | 96.08 × 0.832674 = 80 mpg US |
| 108.09 mpg uk | 90 mpg | High-Efficiency Four-Stroke Urban Motorbike | 108.09 × 0.832674 = 90 mpg US |
| 120.09 mpg uk | 100 mpg | Ultra-Lightweight Eco-Marathon Mileage Vehicle | 120.09 × 0.832674 = 100 mpg US |
Miles per Gallon (UK) to Miles per Gallon (US) Formula & Unit Definitions
One US liquid gallon contains 3.785411784 liters, while one British Imperial gallon contains 4.54609 liters. Dividing 3.785411784 by 4.54609 yields the exact factor of 0.83267418 (~0.832674). To convert UK MPG to US MPG, multiply the British figure by 0.832674 (or divide by 1.20095).
Quick Estimation: Quick mental shortcut: To convert UK MPG to US MPG in your head, subtract one-sixth (~16.7%) from the UK figure. For example, 36 mpg UK - (36 ÷ 6) = 36 - 6 = 30 mpg US (exact: 30.00 mpg US).
Miles per Gallon (UK) — mpg UK
British Imperial Standard- Imperial gallon defined under British law as exactly 4.54609 liters (10 lbs water)
- Standard metric for UK vehicle ratings, British car reviews, and manufacturer specifications
- Yields nominally higher efficiency numbers because the fuel volume per unit is larger
Miles per Gallon (US) — mpg US
US EPA Standard- US liquid gallon defined as exactly 231 cubic inches (3.785411784 liters)
- Official standard for US EPA window stickers and Corporate Average Fuel Economy (CAFE)
- Yields nominally lower efficiency numbers reflecting smaller US gallon capacity
Frequently Asked Questions
Q.Why is UK MPG higher than US MPG?
A British Imperial gallon is approximately 20% larger than a US gallon (4.546 liters vs 3.785 liters), so a car travels more miles per UK gallon.
Q.What is the reverse conversion from MPG (US) to MPG (UK)?
To convert back, use the MPG US to MPG UK Converter where 1 mpg US equals approximately 1.20095 mpg UK.
Q.How do I convert UK MPG to US MPG quickly in my head?
Subtract roughly 16.7% (or one-sixth) from your UK MPG value (e.g. 36 mpg UK - 6 = 30 mpg US).
Q.How many US MPG is 36.03 UK MPG?
36.03 UK MPG equals exactly 30 US MPG.
Q.What formula converts UK MPG to US MPG?
Multiply UK MPG by 0.832674 (or divide by 1.20095): MPG (US) = MPG (UK) × 0.832674.